Sylvania



v 3 Sheets-Sheet 1. J, H; KAISER & A. B. LEDWITH.

(No Model.)

ELECTRIC TIME LOCK.

No. 447,409. Patented Mar. 3, 18-91.

)/(a; '4; 4 4 4 m gags? Wlhwsse s 5" r /"l/ (No Model.) 3 Sheets-Sheet2. J. H. KAISER & A. B. LEDWITH.

ELECTRIC TIME-LOCK.

Patented: Mar. 3, 1891 fi xw' Dryin by M UNITED STATES PATENT OFFICE. 1

JOSEPII II. KAISER AND ANDREIV B. LEDIVITH, OF BROWVNSVILLE, PENN-SYLVANIA.

ELECTRIC TIME-LOCK.

SPECIFICATION forming part of Letters Patent No.-4.4f7,409, dated March3, 1891.

Application filed May 15, 1890. Serial No. 351,932. (No model.)

To all whom it may concern:

Be it known that we, JOSEPH I l. KAISER and ANDREW B. I'JEDWITH,citizens of the United States, residing at Brownsville, in the county ofFayette and State of Pennsylvania, have invented certain new and usefulImprove ments in Electric Time-Locks; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use the same, reference being had to the accompanying drawings,which form a part of this specification.

Our invention relates to an improved electrical time-lock for safes; andit consists in a locking-bolt, a means for operating the same, anelectrical operating device for facilitating or aiding theclock-movement in operating the bolt, and a device whereby the bolt maybe operated from the outside of the door, together with certain detailsof construction and combination of parts, as will be fully set forthhereinafterl 'In the accompanying drawings, Figure 1 is an inside faceview of a safe-door provided with our improved time-lock. Fig. 2 is afront elevation of an ordinary clock-movement having the dial removedtherefrom and showing our improvements attached thereto. Fig. 3 is afront view or elevation of the magnets and their attachments used foroperating the bolting mechanism. Fig. 4 is a rear elevation of the same.Fig. 5.is a sectional side elevation of the contacts for opening thelock from the outside of the door. Fig. 6 is an enlarged side elevationof the spring-Conn ecting crankbar and clock-movement for operating thesame. Fig 7 is a plan view of the same having the spring removedtherefrom. Fig.8 is an enlarged side elevation of the central clock orhour post, showing the pointer-ratchet and hour-wheel in section. Fig. 9is a detail View of the insulated pin and battery to be used inconnection with the two contact-plates and the circuit for closing thesame from the outside of a safe-door should the devices get out oforder.

To put our invention into practice with the lock of a safe-door A, suchas arenow in common use, and consisting of three horizontally and twovertically moving bolts 1, attached together by a bar 2 and suitablecranks 3 and moving in proper bearings 4, and opened and closed by meansof a handle located outside the door in a manner well known to the art,we provide a clock movement and attach the same in a suitable positionon the inner side of the door A. This clock-movement is provided with agraduated dial 5 and a sin gle hour hand or pointer 6. At the rear ofthe central bolt 1 is pivoted in a suitable hearing 57 a locking-crank7, one end of which is adapted to be moved and occupy a position at therear of the said central bolt 1, and the other extremity projectingupward and attached to a draw-bar 8, located at the rear of theclock-movement and connected to an independent movement arranged andattached at the left side of the clock. This bar 8 is divided and oneportion moving within the other, whereby the length of the bar 8 may beincreased or diminished without interfering with the position of eitherthe crank 9 or locking-crank 7. A suitable coil-spring 11, bearingagainst a rigid collar 12, formed on one section of the said bar 8 andagainst a loose collar 13. and pin 14, passed through the other section,and operating in a slot 15,

formed in the bar 8, serves to keep the said bar 8 the desired length toproperly operate the locking-crank '7'. Attached to the shaft or spindle47, to which the crank 9 is affixed, is a strong flat coil-spring 16,which,

'in connection with a ratchet-wheel 17 and several other toothed wheels18 and intermediate pinions 19, serves as a means or power to withdrawthe locking-crank 7 from the rear of the central bolt 1. The object ofthe several gear-wheels l8 and pinions 19 is to give a rapid rotarymovement to a small disk 20, having a series of outwardly-projectingpins 21, which operate against a pivoted lever 22 and prevent anymovement of the crank 7 until the lever is released by the clock. Thislever 22 projects upward and is within reach of a ratchet-crank 24,having an outwardlyprojecting pin 25 secured therein. The arrangement ofthe hour-wheel 26 on the central shaft 55 of the clock-movement may beseen by reference to Fig. 8 on the drawings. The hour-Wheel 26 isprovided with an elongated hub 27, on which the ratchet crank wheel 24is attached, which is also provided with a similar hub 28, on which thehour hand or pointer 6 is secured. These several parts all move togetherand may be operated by a suitable key placed on the square end of thedriving-shaft 55. Beneath and to one side of this clock-movement isarranged a pair of magnets 29, suitably connected together and attachedto the frame of the movement. Pivoted to the pin 31, to which the lever22 is attached, is an armature 32, which, together with the said lever,is rigidly secured to the pin 31, in order that the two may operatetogether. Secured to this armature 32 is a rearwardly-extending pin 33,provided with a hooked end, to which is attached a small spiral spring34, the other extremity of which is connected to a portion of the frame35 in a manner that will keep the armature 32 away from the magnets 29and the lever 22 in the proper position to engage with its operatingpin21. Beneath the magnets 29 and insulatd 37 from the frame 35 of the sameis a small contact-bar 38, which may be adjusted by means of ascrew-thread formed thereon. Operating in conjunction with this bar 38is a flexible contact 39, which is secured to one side of the armaturein a manner that when the said armature 32 is partly moved toward themagnets 29 the flexible piece 39 will be in contact with the bar 38, andthereby complete a circuit through the magnets 29, which will be morefully set forth hereinafter.

Near the top of the clock-movement and attached to the frame 30 of thesame is a bracket 40, properly insulated and provided with twobinding-posts 41. Near this bracket 40 is located a spring-contact 42,which is insulated 43 from the clockanovement and electrically connectedby a wire 44 to one of the binding-posts 41. The lower extremity of thisspring-contact 42 is adapted to be placed in and out of cont-act with asmall circular piece 45, attached to the main stem 47 of the secondaryclock-movement in a manner that when thissaid movement is wound thespring 42 will be in contact, and when the tension is taken 06 the saidmovement the spring 42 will be out of contact. This circular contact isprovided with an overhanging flange 46, which extends partly about itsperiphery, and when the movement is in one position the same is out ofreach of the spring 42, and when wound or turned to the right theextremity of the spring rides on the top of the flange 46, therebyforming a contact.

Located at any desired point on the inner side of the safe-door are twocontacts 48, the one slightly separated from the other in a manner thata small circular metallic pin placed between the same will complete orform an electrical connection between the two. The upper contact 48 isconnected by a wire 49 to one of the magnets 29, and the lower contact48 by a wire 50 to the other magnet.

In Fig. 9 of the drawings I have illustrated means for closing thecircuit from the outside of the safe-door, which consists of aninsulated pin 60, a battery 61, and connections 62 62 intermediatebetween the pin and the battery. The pin is constructed in twolongitudinal metallic parts, which are insulated from each other byalongitudinal central insulating material 63, which extends from end toend of said pin, and the outer surface of the pin has a suitableinsulating-covcring 64, while the inner ends of the sections of the pinare enlarged somewhat, as shown. After a hole has been bored or cut inthe safe-door at a point between the two-contact-plates 48 48, theenlarged endof the insulated pin is inserted into said opening and it iscaused to fit snugly between and against the two contacts 4S, and to onesection of the pin the wire 62 is secured and to the other,section ofthe pin the wire 62 is connected, both wires leading thence to thebattery 61. A complete circuit is thus formed, commencing at the battery61, then through the wire (32 to one section of the insulated pin, onecontact 48, the wire 49, the magnets 29, through the wire 50, the othercontact 48, the other section of the insulated pin, the wire (32, andthence back to the battery 61. This last-described circuit is for thepurpose of opening the lock from the outside of the door, which may beaccomplished by knowing the exact location of the opening between thetwo contacts 48 and then drilling a hole with suitable tools in theexact position and using a battery and making a contact of the two polesof the same with the two contacts 48. This circuit is only used in casethe clock mechanism becomes out of order and refuses to operate. Afterthe safe has been opened in this manner, the hole or opening made in thedoor is plugged and the contacts 48 removed to some other position,which may be known to one or more persons.

At a suitable position on the inside of the door is located a batteryfor operating the circuit which aids the clock-movement to remove thelocking-crank 7 from the rear of the central bolt 1. Connected in thiscircuit is a single-stroke bell 52, to give notice when the door may beopened. This bell 52 only rings when the circuit is complete.

To complete the above circuit from the battery to the magnets 29, a Wire53 is connected to the said battery 51 with one of the binding-posts 4i,and from thence by a wire 52 to one of the contact-plates 48, and fromthis point by a wire 49 to one of the magnets 29, through the magnets 29by a wire 50 to the other contact-plate 48, from this point by a wire 54to the bar 88, and thence to the springcontact 39, secured to thearmature 32, through the armature 32 to the lever 22, from the lever 22into the clock-movement to the circular contact 45, thence through thespring-contact 42 to the wire 44 to the other bindingpost 41, and fromthis point by means of a wire back. to the battery 5'7.

In operation a key is secured to the stem 47 of the secondary movementfor operating the locking-crank 7 and the same revolved to wind thespring 16 and thereby force the crank 9 into position at the rear of thecentral bolt 1. These bolts 1, when the door is open, are all moved bymeans of the outside handle inwardly and the locking-crank 7, resting onthe top of the central bolt 1, the bar 8 being permitted to contract inlength by its peculiar construction. The dooris now closed and thehandle turned to shoot the bolts into the door-frame, which permits thelockingcrank 7 to snap behind the central bolt 1,

which looks the door, which can then be opened at a certain hour by theclock-movement.

In order to have the lock open in a given number of hours, the hand orpointer 6 is simply revolved until the same points or indicates thatnumber on the face or dial 5. The pointer 6 being in a direct line withthe ratchet-crank 24, or so arranged that when the pointer (3 indicatesthe last hour on the dial, the small ,pin 25, secured in theratchetcrank 24, will engage with the lever 22, move the same aboutitspivotal point a short'distance, thereby moving the armature 32 towardthe magnets 29 until thespring 39 is in contact with the bar 38 and acircuit is completed. When this circuit is made, the ma nets attract thearmature 32 and release the disk 20, which. is held stationary by one ofits pins 21, engaging with a projection 56, formed on the lever 22,thereby releasing the secondary movement, which draws the crank 9 back,and by meansof i s connecting-bar S revolves the locking-crank 7 upward,thereby releasing the bolts 1, and the safe-door is opened by thehandle. At the moment the circuitfor releasing the secondary movementhas been completed the alarm-bell 52 gives one tap to warn the cashieror others that the door may be opened.

Then the locking-crank is in a position, as shown at Fig. 2 on thedrawings the circuit is broken, as the circular contact 45 has revolvedbeyond the reach of the spring i2, which releases the armature 32 andpermits the lever 2 to again engage with the pins 21 of the disk 20 andresume its former position by the action of the small spiral spring 34.

Having thus described our'invention, what we claim, and desire to secureby Letters Patent, is

1. In a time-lock for safe-doors, the combination consisting of thelocking-crank divided bar 8, actuated by a spring 11 and connected to acrank 9 of a secondary movement, and a means for releasing the saidmovement ata given time, as and for the purpose set forth.

2. In combination with a time locking device operated by an electricalcircuit, an open branch circuit provided with contact-plates separatedthe one from the other and located at a suitable point on the innerside'of the door, whereby a contact or connection may crank, a secondaryclock-work connected to t. it

said extensible rod and having the stop-wheel 20, a primary timemechanism having its hand-arbor provided with the arm 24, an elec-.trical circuit including the magnets 29, the

contacts, and the armature for the purpose of closing said circuit and alever 56, which normally engages the stop-wheel 20 to arrest thesecondary clock mechanism and which carries an armature to be attractedby the magnets, said lever being arranged in the path of the arm 24: ofthe primary time mechanism and adapted to be operated by said arm at theproper period of time to close the circuit through the armature andrelease the stop-wheel 20, whereby the secondary time mechanism isreleased to retract the extensible rod and withdraw the locking-crankout of the path of the bolt-works, substantially as described.

4. In a time-lock, the combination, with the bolt-works, of alocking-crank, a secondary clock-work, an extensible spring-controlledrod connected to said locking-crank and to the secondary clock-work tobe operated by the latter, an open electrical circuit, the magnetsincluded in said circuit, a primary time mechanism having its hand-arborprovided with an arm, and alever 22, arranged in the path of the arm ofthe primary time mechanism and carrying an armature and contactpiece toclose the electric circuit through said magnets and armature, wherebythe secondary clock-work is released from the lever and operates toretract the extensible rod and the locking-crank, substantially asdescribed.

5. In a time-lock, the combination, with the bolt-works, of alocking-crank, a secondary clock-work having the stop-wheel 20 and therotatory contact 45, a rod 8, connected to the locking-crank and to theclock-work, an open electrical circuit, the magnets included in saidcircuit and having the yielding contact which presses against the rotarycontact 45 of the secondary clock-work, a primary time mechanism havingthe arm, and a lever 22, held in the path of the arm of said primarytime mechanism and carrying an armature, for the purpose described,substantially as set forth.

6. In a time-lock, the combination, with the bolt-works, of a pivotedlocking-crank, a sec- Ondary clock-work having the stop-disk 20, the rod8, connected to the locking-crank and to the secondary clock-work andhaving the extensible sections and the retracting-spring,

anism having the arm 24, the lever normally engaging the stop -wheel ofthe secondary clock-work and arranged in the path of the arms of saidprimary time mechanism, and the armature and contact-piece carried bythe lever and adapted to close the circuit when attracted by themagnets, for the purpose described, substantially as set forth.

7. In a time-lock, the combination, with the bolt-works, of alocking-crank, a secondary clock-work having the stop-wheel 20, the rodintermediate of the locking-crank and the secondary clock-work, the openelectrical circuit, the magnets included .in said circuit, the spacedelectrical contacts 48, included in said circuit and adapted to beclosed by insertion of a pin between said plates, the le- JOSEPH II.KAISER. L. S. ANDREIV B. LEDVITII. L. S.

In presence of- ERASMUS KAISER, LEVI C. WAGGONER.

